Capped screw-nut



(No Model.)

A. SEABLS..

`Patented Apr. 24,1883.

` UNITED STATES PATENT Ormea..

ANSON SEARLS, OF NEWARK, NEW JERSEY.

CAPPI-:D SCREW-NUT.

SPECIFICATION forming part of Letters'Patent No. 276,482, dated Apr124, 1883.

Application filed anuary 9, 1883. (No model.)

To all whom it may concern Be it known that I, ANSON SEARLS, residing `and useful Improvement in Gapped Screw Nuts, of which the following is a specilication, reference bein ghad to the accompanying draw-` ings, forming part ot the same, in which- Figure lis a centralaxialsection ofa capped nut containing my invention. Fig. 2 is asimilar view of one part, and Fig. 3 of the other part, ot' the cap removed from the nut.` Fig. 4 is a side view, ot' the nut with the cap removed, and Fig. 5 is a bottom face view ofthe same.

My invention relates to a screw-nut provided lvith a metal Vcap covering the one face of the same; and it consists in the following-Ilescrihed nut, and the cap composed of the described parts applied and secured on thennt, as specified.

A is the screw-nut, provided with the projecting rim or Hange B. The cap consists of the two parts C and D. The part D, made ot' sheet metal ot' suitable thickness, is represented as having the form of a frustum of a hollow cone, and is placed on the upper face of the flange B,the diameter of its base coinciding with that of said liange, so that it rests upon and is supported by said liange at its perimeter, as shown plainly in Fig. l. The part C, also made of sheet metal, corresponds in l'orxn to 'the pa-rt D, but is enough larger to fit down snugly upon it', as shown in Fig. l. These lparts are ont from sheet metal and struck up in suitable dies. The base of Gex# tends over and beyond the outer edge of the angeB, and is crimped or gathered in under the edge of said ange', as shown, so as to secure both itself and the part D tightly onto the nut.

By this construction and arrangement o fhe parts, D, resting upon aud supported by I'fle Bange B, affords a sti and firm support to the part. C, while both together form a cap of suiiicient strength and stiffness to bear Without denting or other injury outside pressure and blows about as wellV aswould a cap made of sheet metal of a thickness equal to both C and D, which would be difficult or impracticable to vmake. The cap is also thereby secured more firmly on the nut and prevented `from being forced down onto it, so as to-be 1ooscned, as it might be if made of a single piece of' thick metal.

Instead of having the precise form represented inthe drawings, the cap may be spherical, or of any other desired form that will leave a chamber into which the end ofthe screw-bolt on which the nut is to be placed may extend, and that will also permit the edge of the base of the partD to rest upon the face of the ange B. Nut-s thus capped are specially adapted to he used ou the exposed ends ot' bolts iu carriages, that require to be protected from rusting by exposure to the elements and to have a handsome linisli.

What I claim as myinvention,and desire to secure by Letters Patent, is-

As a new article of manufacture, the described capped screw-nut, composed ol' the nut' A, provided with a flange, B, and a cap consisting of the two cup-shaped parts C and D, the base ot' the part D resting upon the face of the said ange, and the part C placed over and upon the part D, with its base crimped or gathered in under the edge of the said flange, thus forming a closed chamber between the cap and the nut, into which the screw-bolt on which the nut may be screwed can enter, as and for the purpose described.

ANSON SEARLS. Witnesses:

A. G. N. VERMILYA,

HENRY EIOHLING. 

